Page:Popular Science Monthly Volume 89.djvu/395

 Popular Science Monthhf

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��Tethering the Largest of the Super-Dreadnoughts

TWV. illiislration represents the largest aiulior ever made. It weighs twenty thousand pounds.

It is made of cast steel; that is, a liquid steel poured in a mold of sand, made from a pattern of wood similar in shape to the anchor itself. The anchor which had the distinction of being the largest in the world previous to the mai.ufacturc of the one illustrated here, was one weighing eighteen thousand five hundred pounds.

The principal use to which this size anchor is put is for anchoring the largest super-dreadnoughts which the United States Navy is now building. The great battleship or super-dread- nought "Pennsylvania," recently piut into commission, is equipped with such anchors. Smaller anchors of the same type are used widely on both Government, foreign and mer- chant vessels, the smallest weighing two hundred pounds. The smallest battleships and cruisers have anchors weighing usually from eight thousand fi\'e hundred pounds to sixteen thousand ri\-e hundred pounds

each.

The design of the anchor is

simple. It is constructed on

the ball and

socket prin- ciple with no

pins to break

or bend or

drop out. The Ihike,

or main por- tion, is in one

solid piece

and the

shank has an

end like a

bail working

in a socket. Al a n \-

anchors are

hinged on a

pin which

rusts (ui t

and fails to

hold.

��A Hand-Made Hand-Played Phonograph

A KANSAS CITY man has invented a "phonograph" which is operated by hand and which may be built at a

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��A Phonograph Which Requires No Expen- sive Cabinet. It Will Play Any of the Standard Records

���The Anchor Is Constructed on the Principle of a Ball and Socket, with the Fluke or Main Portion in One Piece

��cost of ten or fifteen cents. On this odd in- strument, any standard record is placed upon a central peg, the lower part of which resolves itself into a handle. A revolving shaft is then placed upon the center post above the record. This shaft has at its outer end an attachment which hclds the needle firmly in the required position.

Beyond the needle-holder isa weight. A sheet of celluloid, parchment, or even ordinar>' paper fastened to the bar near the needle constitutes the sounding-board of this unique con- paper, however, will refract a thinner sound than will cellu- loid.

The "])honograph" ^^ is operated ^^ by a twist of the wrist. The weight at the outer end of the re- volving; shaft insures its circular mo- tion and the needle, fol- lowing the grooves in the record, spirals its way toward the center of the record.

��trivance. Th

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